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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Determination of yield of benzene-soluble extract in brown coals
Standard published on 6.2.2018
Selected format:Test methods for the properties of piezoelectric ceramics - Test for the ageing properties
Standard published on 20.10.2008
Selected format:Technical product documentation--Requirements for computer aided design and drafting--Vocabulary
Standard published on 23.11.1995
Selected format:Terminology of circular-arc gear
Standard published on 23.11.1995
Selected format:Accuracy of cylindrical gear with circular-arc toothprofile
Standard published on 23.11.1995
Selected format:Geometrical product specifications (GPS)—Dimensioning and tolerancing—Cones
Standard published on 30.5.2025
Selected format:The calculation and selection of cone interference fits
Standard published on 23.11.1995
Selected format:General purpose metric screw threads - Limits of sizes
Standard published on 30.7.2008
Selected format:Geometrical product specifications(GPS)--Surface imperfections--Termsdefinitions and parameters
Standard published on 15.7.2002
Selected format:Basic terminology of spline
Standard published on 27.9.2008
Selected format:Latest update: 2026-06-10 (Number of items: 2 281 917)
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